Purpose: The purpose of this paper is to explore US students' experience in for-credit, unpaid internships overseas with particular reference to their personal development, how they mobilised their knowledge across contexts, their learning as acquisition and as participation, and what they contributed. Students were thought likely to encounter three forms of cultural differences: national, workplace and academic. Design/methodology/approach: In total, 17 students in communication, marketing or related fields from the USA were placed in four-week internships in Wellington, New Zealand. Outcomes for them were assessed first, via weekly discussions in which they described what they had encountered that week, second, via the presentations they gave at the end of the course to internship hosts and university staff on the subject of what they had found challenging and what they had learned and contributed, and third, through assessment of students' formal written assignments to discover what they said they had learned and what they had contributed. Findings: Students were surprised at how proactive their internship hosts expected them to be and at how little overt direction they received. While they valued their opportunity to make a contribution to their workplace, they found this challenging. Students gave instances of their learning both as individuals and in groups. No mention was made of academic cultural differences being an issue, but they often described the demanding nature of the national and workplace cultural differences that they encountered. Research limitations/implications: The study reports on only one cohort of students in one year, so a longitudinal study of further cohorts might provide different findings. Originality/value: Insights are provided into how students saw themselves as changing from their involvement. Students described the challenges they faced, how they reacted to those challenges and their most important forms of learning.